What a useful GLP-1 tracker should record
Shot history
Date, time, dose, injection site, and whether a scheduled dose was completed, skipped, or delayed.
Progress and side effects
Weight trends and timestamped symptoms create a record to discuss with a qualified clinician.
Schedule context
Reminders and a clear weekly timeline reduce dependence on memory and scattered notes.
Estimated levels
A model can illustrate dose accumulation and decay, but it cannot measure your personal blood concentration.
Free GLP-1 tracker app option
For searchers looking specifically for a free GLP-1 tracker or a simple GLP-1 app, Halflife is free to download on iPhone. The exact free-tier scope should always be checked in the current App Store listing because product details can change.
See the dedicated free GLP-1 tracker app page for the short buyer-intent answer, then return here for the broader workflow comparison.
Halflife versus a dedicated GLP-1 tracker
Halflife’s official App Store listing says it supports GLP-1 medications inside a broader multi-compound protocol system. Shotsy’s official site says it is designed specifically around GLP-1 treatment and reports 1M+ downloads, a 4.9 rating, and iOS and Android links.
The better fit is conditional. Choose a dedicated GLP-1 app when the narrow workflow is the benefit. Choose a broader tracker when GLP-1 treatment is only one part of the records you need to organize.
Sources checked June 19, 2026: Halflife App Store and Shotsy official site.
Important limitation
Medication-level curves are estimates. The true amount in an individual is unknown without appropriate measurement, and it may differ because of formulation, absorption, route, timing, metabolism, and individual physiology. Do not use a consumer tracker estimate to change a prescribed dose.
Frequently asked questions
Is there a free GLP-1 tracker app?
Halflife is free to download for iPhone, and its current App Store listing describes a free tier for logging and tools. Verify the current listing before relying on a feature.
What is the best GLP-1 tracker app?
The best fit depends on the workflow. Shotsy is publicly positioned as a dedicated GLP-1 tracker. Halflife is a broader iPhone protocol tracker that includes GLP-1s alongside peptides and other compounds.
Can a GLP-1 tracker show exact medication levels?
No. A tracker can show an estimate based on a model and recorded doses, but it cannot establish an exact individual concentration.
Does Halflife track tirzepatide and semaglutide?
Yes. The current App Store listing and public compound database include tirzepatide and semaglutide.
Keep the complete record in one place
Halflife - Peptide & GLP-1 Log organizes injection logs, schedules, vial inventory, sites, symptoms, and clearly labeled estimates on iPhone.
Download Halflife - Peptide & GLP-1 Log